Apparatus for cleaning gas and vapors, more especially blast-furnace gases



Feb. 10. 1925.

H HENRICH APPARATUS FOR CLEANING GA S AND VAPORS, MORE ESPECIALLY BLAST FURNACE GASES Filed Aug. 15 1921 Inventor u L. W

.lttorn ey.

Patented Feb. 10, 1925.

PA T E iN T O F FIC E.

's D'tIIjSjBTTItGrfiGEB-MANY, Assrenoe TO nntr'rscnn MASCI'IINEN- FABRIK A; G., or DUISBIIRG, GERMANY.

Armaments {FOR c'n'saijvlile else vase-es, MORE ESI EQIAFLLY ianes'r susnees eesns.

10 all whom it may concern:

Be it known that =1, PIERMZXNN HENRIOH, -a citizen of the German State, residing at 1'12 Hindenburgstrasse, Duisburg, Germany, have invented a certain new and useful Apparatus "for Cleaning Gases "and Vapors, More Especially Blest Furnace Gasegof which the following is a specification.

a The present invention has for its object to provide an apparatus for preventing loss of temperature in the gases to he cleaned, and simultaneously effect a saving in space and material. 7 V

According to the invention the filter and the preheater' are combined into single enelosed app'aratus so that pipes for eonneeting the two s'ets o f apparatus are rendered superfluous. The filter an'd the pre h'eater are advantageohsly disposed 'one above the other, but it is imnrate'rial to -the invention Whether the filter surfaces are disposed above the preheater or Whether the latter is disposed above the filter surfaces. This last lnentioned disposition -hasthe advantage over the first eamed arrangement that it prevents the particles of dust deposited on the filter surfaces from passing in the op- :pesiteidireetion to the current of gas 'into "the d st receptacle; "thus dust already sepai-atecl eanmt possible retu'i 'n tothe filter surfaces. Furthermore the "heatilig medium in the we apparatus is carried along injsu'eh a way that it "surrounds the passage alon which travel the gases "to be cleaned -"in the pi-cheater. The principel advantagespf the apparatus cccedin "tofthe invention are onoiny "cohihinedhvith compactness "of constru'ctiol'i. 'Morcoverfthe nseof the apparates or hlast i'urltaces secures the further advantage that theepparatue maybe erected above "the usual turn't'ce dust reeeptacle.

Fhither;more, the "pipes which it "has hith- 'erto heen hecessery to pfoi ide hettveen the furnace duet receptacle and the cleaner are renderedsu erfluous. *In thlsease false, the

apparatus ma he atwhee-attached to an furnace, even where the space "round the "tui'nhce is liniitedl [Finallyfthelid of the dust rece tacle; that is, ofthe recep' tecle of the ajpparatu-s itself- 01* the 'itutnace dust receptacle can he tekieghp vertical expansion of the material caused by the "heat, andthus the two parts of the apparatus, can be, Very conveniently erected one above theother and firmly secured Wl'tl1- out the various structural elements being subjected to harmtulstrains due 'to vertical expansion.

The invention is illustrated diagrainmatically in the darawin'g by Way of example.

Figure 1 illustrates e vertical seetion of the combinedapparatus, in which the filter surfacesare disposed above the preheater.

Figure 2 is a cross section on A-B of Figure 1.

Figure 3 is a part View oftwo apparatus adjacentlydisposed and connected together;

liigure l illustrates the apparatus in combin'a'tion with the dust receptacle of a blast furnace.

ais a filter of known construction, 6 the pr'eh'eat'er, and 0 the dust receptacle.

The filter a comprises a circumferential series of filter pockets t the cavities between "the filteringsuritaces "being open towards the lower end of the filter for the upward admission of the gases to be cleansed. The filter pockets (0 thustorm a central outlet (a into Whichthe cleansed gasesi ssue and from which they pass to'the outletfpipe g. A filter of this type is described inthe specifi'eationof the co-pendin'g applicatioii L D/492,494. At a are in dicated rotating nozzles for the admission of air under pressure as a means for removing the dust from the filter pockets. It will he understood, however, that anyother filt-er "of known construction may he employed and that neither the construction of the illustrated filter a northe-nozzles (1 form a part of the present invention,

From the drawing it will be seen that filter and "preheater are cenihined to form ah en se cl' apparatus, in such manner that the sesto he cl'e'afied (shown by feathered filter a. can be quite simply interrupted at any time. The heating gases or vapors (shown by unfeathered arrows) enter through the pipe j, circulate through the annular space 70 surrounding the cone 7, flow round the inner cylinder Z which is likewise surrounded by the annulus 7;, they then pass through the heating pipes and through the outer hollow jacket m of the preheater b, and finally leave the latter through the pipe 17. The gases to be cleaned travel exclusively inside heated chambers insulated on the outside by the heating medium to prevent loss of heat, so that they retain without loss their original temperature and receive the necessary increase in temperature through the preheater. The lower closure of the preheater Z) is formed into a funnel 0, which opens into the dust receptacle 0. The cover plate 32 of the dust receptacle 0 is formed as a flexible or r silient plate, which can be bent up and down within certain limits. Between the funnel 0 and the dust receptacle 0, also at the bottom of the latter, there are provided sliding doors 9 and r. The combined apparatus is advantageously fixed in position at two positions 8 and 2?, namely, where the filter a is connected to the preheater Z), and at the dust receptacle 0. Thus the vertical distance from s to t is fixed. If the two apparatus a, and Z) increase in length due to changes in temperature, a can freely expand upwards, whereas Z) passes the changes on to the dust receptacle 0, where they are effected without injury by drawing up or depressing the flexible cover plate p.

If two similar apparatus are provided side by side, they are combined in known manner; for example by a passage 14, which connects the two funnels 0 and which is provided with a sliding door '0. This passage a may likewise be advantageously provided with a dust receptacle w, which is divided into two by a vertical partition wall to correspond to the two cleaners and is provided with a single sliding bottom 00 for the two divisions.

In Figure 4- the blast furnace is represented by 1 and the dust receptacle by .2 immediately above which latter the preheat iug and filtering plant is erected.

The purpose and manner of working the apparatus the subject matter of theinvention are clear from the foreging by refer-- ence also to the drawings. Furthermore, it is clear that the proposed combination and construction of filter and preheater very considerably reduces space and materials; moreover, by the elimination of all pipes on the one hand and the exterior insulation of the gases to be cleaned by the heating medium on the other the problem is solved of preventing loss of heat and reducing heating temperature to a minimum,

I claim:

1. In apparatus for purifying, by means of dry filters, gases and vapors and more especially blast furnace gases, comprising a filter, a pre-heater disposed below said filter for pre-heating the gases before filtration and a single casing enclosing said filter and said pre-heater, a dust receptacle below said pre-heater and a conduit extending from the filter for the passage of separated dust to the said dust receptacle, said conduit serving to prevent contact of said separated dust with said pre-heater.

2. In apparatus for purifying, by means of dry filters, gases and vapors, more especially blast furnace gases comprising a filter, a pre-heater disposed below said filter for pre-heating the gases before filtration and a. single casing enclosing said filter and said pre-heater, a dust receptacle below said pre-heater and a conduit extending downwardly from said filter, said conduit serv-' ing as a passage both for the pre-heated gases to the filter and for the separated dust from the said filter to said dust receptacle.

3. In apparatus for purifying, by means of dry filters, gases and vapors, more especially blast furnaces comprising a filter, a pre-heater disposed below said filter for pre-heating the gases before filtration and a single casing enclosing said filter and said preheater, an annular pre-heater, a dust receptacle below said annular preheater and said filter, and a centrally disposed conduit extending downwardly from said filter through said annular pre-heater, said conduit serving as a passage both for the pre-heated gases from the pre-heater to the filter and for the separated dust from said filter to said dust receptacle.

4-. In apparatus for purifying, by means of dry filters, gases and vapors, more es pecially blast furnace gases, comprising a filter, a pre-heater disposed below said filter and a single casing enclosing said filter and said preheater, a dust receptacle below said pre-heater, said dust receptacle having a cover in the form of a flexible plate adapted for being bent to accommodate the expansion and contraction of the respective elements of the apparatus, and a conduit extending from the filter for the passage of separated dust to the said dust receptacle,

said conduit serving to prevent contact of said'separated dust with said pre-heater.

5. In apparatus for purifying, by means of dry filters, gases and vapors, more especially blast furnace gases, comprising a filter, a pre-heater disposed below said filter and a single casing enclosing said filter and said ore-heater, a pre-heater formed with double and concentric annular jackets for the heating medium and forming centrally an upward outlet for the ore-heated gases ill) ner annular jacket, an outlet for the heating medium to the outer annular jacket, an inlet to the pre-heater for the gases to be cleansed and a dust receptacle below said centrally disposed upward outlet.

HERMANN HENRIGH. 

